Susan Harris
All about gardening the eco-friendly way, by Susan Harris and 22 other garden writers and experts.

Organics and more

It’s the Takoma Park, Maryland Green Homes Tour, showcasing 15 homes and gardens, and it’s FREE.  Here’s how to request the details, or go to their website for local green building resources and more.   On my own Woodland Avenue there’s not just my sustainable garden but architect Rick Vitullo’s ultra-green home, too.  Washington Gardener editor Kathy Jentz is also on the tour. We’ll be open for business from 11 to 5.

Takoma’s 15 homes and gardens are just part of the larger DC Solar Homes Tour.   It features 50 homes that are open both Saturday and Sunday - check their website for full details.  

Below the jump is the hand-out that’ll be available for Green House&Garden Tour-goers.

 

Notes on the Sustainability of this Garden

I KILLED MY LAWN

Why?  Because I hated mowing, and I wanted plants that offer more for wildlife and for my own enjoyment than turfgrass.  (Btw, beautiful lawns CAN be grown organically – see www.SafeLawns.org.)

Front: In the fall of 2007 I ripped out the lawn in the center oval and attempted to grow food – but there wasn’t enough sun.   Now I’m experimenting with assorted groundcovers, and may add a bird bath.  (For growing food, I’ll try again next year on my sunny deck – in containers.)

Back:  The much larger back lawn met its demise, too – composted with leaves.  The design goal in this lawn replacement was to keep the space open and low – visually and functionally similar to a lawn.  Plants needed to be able to take a bit of foot traffic – at least for weeding and removing litter – and withstand having the garden hose slung across it in the summer.   Also, they needed to require no mowing and no watering – at all – and not cost a lot.  I priced several low creeping perennials but they spread too slowly and would have cost from $1-2,000 to cover the area within one season. (Because it’s on a hillside, covering the ground quickly is essential to prevent erosion.)

The solution:  First I enlarged the borders.  Then for the remaining ex-lawn, the dominant plant here is Sedum acre, which arrived here as a weed.   It was already thick around the dry streambed, so I removed several plugs, planted them in the bare space, and in 3 months the ground is almost completely covered.  Other weeds I’ve allowed to stay are the edible purslane and the native smartweed (Polygonum pensylvanicum), now blooming in fuchsia.  The only money spent was for a few dollars’ worth of white and red clover seeds.  Clover is drought-tolerant and “fixes” nitrogen – captures it from the air and converts it to a form usable by plants.  Later this month I’ll be planting rivers of crocus and chionodoxa (“Glory of the Snow”) across the space and expect to be thoroughly dazzled next spring.

PLANTS CHOSEN FOR SUSTAINABILITY

My garden (certified as a wildlife habitat by the NWF) is a mixture of sustainable plants, both native to this area and well-adapted plants from other regions.  There are full pages about almost all the plants here at Sustainable-Gardening.com – under “Plants” in the navigation bar. [Shrubs are here and Perennials are here.] Unfortunately, English ivy covered much of my garden when I bought it in 1985 (and still covers most of our wooded valley – more on that below).  So I’ve used the ivy to cover the chain-link fence around the front yard but will rip it out when I can afford a decent fence.  Ivy continues to climb the sides of the house and the tool shed.  It’s a total pain to keep in check and I’m researching alternative solutions that isn’t TOO costly.  Meanwhile, I make sure there’s no ivy growing up the trees.

MAINTENANCE

Besides minimal watering during periods of drought, the only maintenance these plants require are weeding (with a hand tool), a yearly application of Takoma Park’s free leafmold mulch in the borders, collection of leaves in the fall, and a bit of pruning. 

PEST MANAGEMENT PRACTICES

I have a 2-part program for garden pests:  1) Tolerance for a bit of insect damage.   2) Intolerance for plants that are severely damaged by pests or diseases – I just get rid of them.  The only exception are the Canadian hemlocks, which I will spray if they ever show signs of wooly adelgid infestation. 

WATER MANAGEMENT

The garden is filled mainly with drought-tolerant plants and the little supplemental watering that’s needed is done by hand.  (I also recommend drip irrigation.)   Container plants on the deck are exclusively succulents, so they never need watering.

Water from the driveway side of the house is directed under a stone retaining wall to discharge into a dry streambed, which slows the water down and can handle the occasional flash flood.   Then in the wooded area the streambed ends and the water is dispersed into the vegetation, which continues to slow it down. 

Water from the other side of the house is fed under boulders and discharged into a 2-foot-deep trench of gravel, then into the wide, intensively planted mixed border of trees, shrubs, perennials and groundcovers that continues all the way to the bottom of the hill.

At the bottom of this wooded valley is a stormwater runoff “creek” that feeds into Sligo Creek.  Unfortunately, there’s no natural solution to the erosion occurring along its banks – because of the unnaturally large quantity of water carried by it, caused by increased development and the piping of water to this creek from other neighborhoods.   An expert from the Anacostia Watershed Society has advised us that vegetation won’t stabilize the stream banks, that only large boulders or other physical barriers will stop the erosion – the exact solution we see along Sligo Creek.  But because  this is privately owned land, we’ve been unable to find any source of funding for such a project.

HOW TO RESTORE OUR VALLEY?

The other obvious ecological problem in this valley is the plant mix at the ground level, where there’s a Battle of the Invasives going on.  Some of us have removed patches of ivy, five-leaf akebia, mustard garlic and other nonnatives in order for native plants to revegetate, but they haven’t been able to out-compete the thugs.  To remove all invasives and restore the valley to its indigenous vegetation is a big job requiring not just funding but also expertise in restoration and a lot of labor for both the removal and the upkeep. 

MORE INFORMATION

There’s LOTS more on my website www.Sustainable-Gardening.com and my blog www.SustainableGardeningblog.com, including slide shows of my garden at other times of the year.   For definitions of sustainable gardening – mine and others – click "Sustainable Gardening 101" under "Gardening" on the navigation bar.  [Here it is.]

Or for information about my garden-coaching, see www.TheGardeningCoach.com.   I specialize in naturalistic, low-maintenance gardening for the budget-conscious.   

For some fun browsing, just follow this link to directories of organic farms all over the world and the internships they’re offering to frankly stronger folks than I.  Also, more tolerant of hardship, but they’re an adventurous bunch of aspiring farmers and if I were just out of college I might just join them. 

 

Then I simply HAD to write Find a Gardening Blog Near You.  

And Organic Gardener hired their second feature writer, known in the blog world as Commonweeder but in real life as Massachusetts gardenwriter Pat Leuchtman.  So far, Pat’s taught me about Growing Raspberries and Growing Organic Herbs.

I’m thoroughly convinced of the need for good composting instruction for homeowners because on all the green or gardening Yahoo groups I subscribe to there’s no END to the questions about it.  That’s why I surveyed people’s experiences with composting and compiled it all in one place on  the DC Urban Gardener website.

So I was browsing the podcasts on my MP3 player and stumbled upon Emma Cooper talking about getting her Master Composter training and certification over in Oxfordshire, England and I’m instantly SOLD on the program.  Here’s my article about it on Organic Gardener.com.

Photo credit.

This is the first installment of a new feature here – reporting the latest teachings of Paul James on "Gardening by the Yard," then discussing same and soliciting reader feedback.  Why?  Because he teaches my kind of gardening – sustainable, organic, all-around ecofriendly and always gardening-loving.  I’ll just be reporting the highlights, though, because not every topic he covers is of interest to me or this site. 

PAUL HEARTS FUNGI

To bring back to life a neighbor’s ailing tree, Paul drills holes all around it, then stuffs them full of compost that’s been injected with mycorrhizal fungi.  Never shy to go out on a limb, Paul proclaims: "I’m convinced that Mycorrhizal fungi represent the future of gardening.  They dramatically increases the roots’ ability to take up nutrients and fight disease."  Their use leads to "improved growth, longer life, less need for fertilizer, and healthier plants"  And he says using synthetic fertilizers is "treating your plant as though it’s some kind of botanical junkie."  Contrasted with "the natural way" with these amazing fungi.   I usually use a slightly different analogy when steering people away from synthetic fertilizers, calling them simply "steroids".   Fair?  How would you describe their effect on soils and the plants in them?

Here’s more about these fungi from the New York Botanical Garden, and the photo comes from that page.

LAWN

In a wide-ranging segment about turfgrasses, we learn that the warm season ones that Paul grows in Tulsa spread aggressively (the "I" word does spring to mind) and need to be contained somehow.  This got me wondering about the cool season grasses that are grown here in Maryland.  They do spread, but would we call them aggressive? 

I swear, half of gardening is getting our plants to grow and the other half is working even harder to control all that growth. 

Paul recommends giving lawns an inch of water once or twice every week, which seems like a lot to me.  Is that because the warm weather grasses will die without it?  I’ve always let me fescue go dormant and it’s always come back in the fall, so I don’t understand suggestions like these.  Is it because the average viewer is just not ready to embrace brown grass?

As to feeding lawns, he recommends organic fertilizers – Paul’s been pushing organics for decades – in early spring and late fall.  He says one test showed that doing that for one year reduced the crabgrass population by 75 percent.  Good one!  It’s why everyone’s telling us that the best way to deal with weeds is to have a nice thick lawn that’ll out-compete them.  But it sure runs directly counter to the romantic belief that everything’s best in our landscapes when we leave it alone, not even add fertilizer to our unsustainable turfgrasses, and just let the whole garden "do its thing."  Well, I’m one former hippie who’ll never forget the body odor that naturally results from that particular philosophy, as good as it may feel.   Bottom line: if you don’t want your "lawn" to be increasingly splotchy and weed-dominated, feed it!   Select almost any combination of  grass clippings, clover, corn gluten meal, compost or any other organic fertilizer – your choice – as long as it’s getting sufficient nitrogen to keep it thriving.

[Second of two Takoma Voice columns revealing what Jeff Gillman has to say in his The Truth about Organic Gardening, with some commentary.]

One look at the product shelves of local nurseries or even at Home Depot will tell you that green is in.  We’re in the midst of a media blitz in service of "green" garden chemicals – and that’s a good thing.  I think.  At least they’ve noticed that we care, but is "green" always good?  Caveat emptor, indeed, and the more we know about these products, the better.  So last month I covered the weed-and-feed advice in Jeff Gillman’s much-talked-about new book, The Truth about Organic Gardening, because it’s environmental information that’s science-based, not slave to any marketing labels.  This month let’s tackle the products with the potential to do the most harm – pesticides.

Preventing insect problems

First, I like Gillman’s philosophy and follow this myself: "One of my favorite ways to deal with pests is by ignoring them and concentrating on getting plants to grow as vigorously as possible."  And I’ll add: choosing the right ones.  Organics aren’t very effective at killing insects, anyway, so it’s best to focus on prevention.  He assures us that most plants can deal with the loss of about a third of their leaf area to insect damage, no problem.  And hey, don’t we want to provide for wildlife anyway?  Nature-loving gardeners these days understand how the plants they grow can contribute to wildlife, especially those songbirds we all love so much.  So more and more of us don’t mind feeding the insects that will feed the birds, as long as our plants can survive the meal.

Killing insects

There are some seriously destructive critters out there, like Japanese beetles, and if they’re in such numbers as to threaten the survival of a plant or make it look butt-ugly (to you), the first tactic is to pick them by hand and bag them or dunk them in soapy water.  Or try a good hard spray with the hose to wash them off.  Traps for Japanese beetles don’t stand up well in tests, though; they end up attracting even more insects, resulting in more damage than if they weren’t used at all. 

Beneficial insects, like ladybugs, eat the insects that damage our plants and you can buy 1,500 of them for about $20 online.  The bad news is that they usually disperse as soon as they’re released.  So the best way to have beneficial insects in your garden is to grow plants that attract them, and avoid the use of broad-spectrum insecticides, to which they’re very vulnerable.  And if you do want to try introducing some, Gillman calls the lacewing a "little-known and underutilized predator" that’s a good choice for controlling aphids, mites, and other small soft-bodied insects.  Unlike ladybugs, they’ll stay in your garden and eat the destructive insects there.  Nematodes,  little worms that eat insects from the inside out, are effective at killing Japanese beetles and can last in the soil for years, providing long-term control.  Sometimes people with Japanese-beetle-plagued plants try to kill them with a bacterial disease called milky spore, but Gillman says it fails more often than it works, with beetles developing resistance to them over time.  They’re most effective when applied to a larger area than just one yard. 
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Of COURSE I know Scotts isn’t paying the Washington Post (right?) but one little item in yesterday’s Source Section did boggle the mind. 

The offending text is here, under "How  Do I Not Screw Up?" In what was otherwise a fine little piece about what plants to grow in pots, reporter Dan Zak wrote: "All plants need sunlight and water, but they also need plant food.  Basic Miracle-Gro or a comparable product will do the trick."  Dan, Dan, Dan.  Please scroll down to the previous post here and read the section about fertilizers, or consult any environmentally responsible gardening authority in the world.   And here’s a handy compilation of articles about overfertilization.

Moving on, here’s the nice part: a gallery of 4 pots planted up for different purposes.  My favorites are of coure the one by Ed Bruske – number 2, for edibles, and number 4 by Kathy Jentz, the "Tough to Kill" design.